Microsoft Teams Webhooks via Office Connectors are being retired by Microsoft by December 31st, 2025. All webhooks must be migrated to Power Automate Workflows:

• https://devblogs.microsoft.com/microsoft365dev/retirement-of-office-365-connectors-within-microsoft-teams/
• https://learn.microsoft.com/en-us/microsoftteams/platform/webhooks-and-connectors/how-to/add-incoming-webhook?tabs=newteams%2Cdotnet

This has been postponed a couple of times and Microsoft has promised that the old "message card" format used by the "old webhooks" will be added as a supported format for the "new webhooks".

However we decided to migrated to the new Adaptive Cards format because:

• The Adaptive Card is also supported by the old Office Connector webhooks. I tested/confirmed this.
• The Adaptive Card is more flexible and future prood.
• By having one format we can support both the old and new webhook urls

So existing instances will keep working. When users configure a new "Power Automate Workflow" based webhook URL, it will also "just work". At least that is what my test results with this PR show.

Fixes #11096

Other changes in this PR:

• Content-Type is set to application/json when POST-ing to MS Teams webhook
• report_created.tpl leftover files removed.
• scan_added_empty.tpl template fixed
• make titles of Tests/Engagements/Product clickable
• add some extra fields to message
• Comment added to msteams templates that are not used as they are only for personal notifications

[sc-11754]